Galvanic cell.



tion Serial No. 631,146, filed June 19,1911,

' iformula Mn( ganic'hydrate may be'readily made from 'manganous hydrate, which is of light yellow color and is a very poor conductor-of elecdark brown good-conducting manganic hy-' *have invented certain new and useful 1m- '-My invention relates to galvanic cells and ITED STAIES GFFIE ALBRECHT HEIL, or FRANKFORT-ON-THE-MAIN, GERMANY, ASSIGNOR To HU'BERT AND smannn seems, BOTH or new YORK, N.

GALVANIC CELL.

Specification of Letters Patent.

Patented Apr. 1 1913.

No Drawing. Original applicationfiled January 3, 1911, Serial No. 600,587. Divided and this application filed January 17, 1913. Serial No. 742,651.

To alZ whom it may concern:

Be it knownthat I, ALBRECHT HEEL, a subject ofthe Emperor of Germany, residing at F rankfort-on-thedllain, Germany,

provements in Galvanic Cells, of which the following is a-specification.

more particularly to galvanic. cells of the kind described in my application Serial N 0. 600,567, filed January 3, 1911, of which this application is a division, and my applica- Which. is also a division of'said original application Serial No. 60 0,567- In my said original application, Serial No. 600,567, is; described and claimed a depolarizing mass formed of an intimate mixture of graphite and dark brown good-conducting manganic hydrate, which is the hydrate of the sesquioxid of man anese, eorrespondingdothe al-D This dark brown mantricity, If this light yellow manganous hy-v drate-is given a long exposureto the at m'osphere, it is oxidized and becomes dark brown manganic hydrate, or if it is brought. while in a moist condition into an atmos phere rich in-oxygen alikeoxidatim takes' lace. In my said divisional application berial No. 634,146 is described and claimed a depolarizingmaterial ofi another hydrate of manganese, which isthe deep black, goodconducting hydrate of manganese dioxid,

such as is obtained by adding hypochlorite of soda to manganese lyes.

' I have discovered that anexcellent depolarizer is obtained by intimately mixing drate and deep black good-conducting'hydrate of manganese dioxid and finely powdered carbon (graphite). This depolarizing mass may be used in the usual manner about the carbon electrode, and'this depolarizing electrode may be used opposite a zinc electrode in a solution. of nitrate of am monium or chlcrid of ammonium or thelikel Such cells have been found to produce ex tremely satisfactory results.

I claim: 1. A galvanic cell comprising positive and negative elements, and a depolarizing mass containing dark brown good-conducting manganic hydrate and deep black good-- conducting hydrate of manganese dioxid.

2. A galvanic cell comprising positive and negative elements, and a depolarizing.

mass COHll'W/Sfid of an intimate mixture of dark brown good conducting manganic hydrate and deep black good-conducting hydrateofr'manganese dioxid and-031mm,.

3. A galvanic cell comprising a positive zinc elenient,'a negative carbon elemen and a depolarizing mass for the negativeelement containing dark brown god ducting manganic hydrate and deep good-conducting hydrate of manganese dioxid and carbon.

4. A galvanic c'ell comprising a positive zinc element, a negative carbon element, and l a depolarizing mass for thenegative carbon element composed of an intimate mixture .of dark brown good-conducting manganic hydrate and deep black good-conducting by drate of manganese .dioxid and carbon.

.In testimony whereof I have aflixed my signature in presence-of two witnesses.

ALBRECHT HEiL.

lVitnesses JEAN GRUND, CARL GRU'ND.

(kipiei; at this patent may be obtained for five centsje aeh, by addressing the Commissioner 3: Patents,

' Washington, D. 0, 

